11-14 FINAL DRIVE

Sprocket, Coupling

Sprocket Wear Inspection

•Visually inspect the engine and rear sprocket teeth for wear and damage.

If the teeth are worn as illustrated, replace the sprocket, and inspect the drive chain wear (see Drive Chain Wear Inspection in the Periodic Maintenance chapter).

Worn Tooth (Engine Sprocket) [A]

Worn Tooth (Rear Sprocket) [B] Direction of Rotation [C]

NOTE

○If a sprocket requires replacement, the chain is probably worn also. When replacing a sprocket, inspect the chain.

Rear Sprocket Warp Inspection

•Raise the rear wheel off the ground with the stand so that it will turn freely.

•Set a dial gauge [A] against the rear sprocket [B] near the teeth as shown in the figure, and rotate [C] the rear wheel to measure the sprocket runout (warp). The difference between the highest and lowest dial gauge readings is the amount of runout (warp).

If the runout exceeds the service limit, replace the rear sprocket.

Rear Sprocket Warp

Standard:	TIR 0.4 mm (0.016 in.) or less
Service Limit:	TIR 0.5 mm (0.020 in.)